Oil-saver.



C. F. RIGBY.

0H. SAVER.

APPLICATION FILED MAR. 26. l9l4- RENEWED' FEB. 25-1915. 1,15%9,

PatentedSept. 7, 1915 E Q Q .3 b Q Q Q\ @N WITNESSES INVENTOR CLARK F. EIGBY, 0F BUTLER, PENNSYLVANIA.

one-seven.

Specification of Letters Patent.

Application filed March 26,- 1914, Serial Ito. 827,88d. Renewed February 585, 191.5. Serial lilo. 10,613.

To all whom it may concern Be it known that I, CLARK F. Riser, a citizen of the United States, and resident of Butler, in the county of Butler and State of Pennsylvania, have invented certain new,

and useful Improvements in Oil-Savers, of which the following is a specification. This invention is directed to certain modifications in the casing closure of my con-- current application, Serial No. 827 ,383, Mar.

26, 1914:, and has particular reference to a cable for drilling tools, .as in my' above ith mentioned application, because of the greater ease with which a sand line may be extended through a casing head, and also because during the intermittent and temporary bailing periods it is unnecessaryto inclose the sand line in astufiing box as is de-' sirable with a drilling cable.

From the foregoing it will be understood that the primary object of this. invention is to provide a closure of simple construction which is capable of ready use and manipulation, and which is adapted to be released by upward pressure from beneath and be moved by the cable in advance and out of the way of the bailer as the latter emerges from the casing.

In the accompanying drawings, Figure 1 is a vertical section of the closure positioned in the casing head, showing the sand. line and bailer in raised position just prior to releasing the closure. Fig. 2 is a view in top plan of the same. Fig. 3 is a sectional plan taken on line 33 of Fig. 1.

Referring to the drawings, 2 designates a well casing, and 3 a casing head secured at its upper end and provided with the lateral outlets 4. and above the outlets the upwardly facing seat 5. The seat is surrounded by annular flange 6 which carries the binding or set screws 7, the latter removably securing on seat 5 the annular seatforming collar 8 which forms an upward continuation of the casing head cavity.

The casing closure consists of the annular head 9 which fits within collar 8, the upper portion of thehead being flared outwardly at 9' to form a supporting shoulder which fits the flared upper extremity 8 of the bore of collar 8. Head 9 is formed with the central vertical passage 10 for cable C,

and movable vertically in this passage and depending therefrom beneath head 9 is sleeve 11 which carries at its lower end the stop 12. The upper end of the sleeve is enlarged to form the head 11'. The sleeve constitutes a lining for passage 10, the

Patented dept. t, 1915..

cable operating therethrough with only sufficient clearance to prevent bindin The beveled horizontally movable latches 13 are slidable in depression 14 which extend downwardly from the top face of head 9. The latches are held normally projected bysprings 15 into position to enter annular groove 16 in the inner face of the collar 8.

Each latch is adapted to be operated by a do 17 which is pivoted between the upstan ing bearings 18 on head 9. The lowerextremity 19 of the dog is entered in de pression 13' in latch 13, and another extremity or odset 20 of the dog overhangsthe headed upper end 11 of sleeve 11. The dogs have comparatively slight movement. When in the position shown in the drawing, the latches are projected into head-en-' gagin' position and sleeve 11 is depressed, but slight upward movement of the latter results in rocking the dogs suiiiciently to retract the latches and release the closure.

This release is edected b engagement of the upper extremity of bai er B'or of looped lower end G of the cable with the lower exillO' tremity of sleeve 11, so that when the bailer has been raised to the top oi: the well it automa tically releases the closure, and the latter is withdrawn from the casin head above and along with the bailer. spring 21 opposes upward movement of sleeve 11 and prevents gas pressure within the well from raising the sleeve and prematurely releasin% the closure. I

he cable C which constitutes the. sand ice line is much smaller than a drilling cable, Y

and is usually simply looped at its lower end through the loop B of the bailer, no rope socket being used as is commonly'employed with drillingltools. Hence, the cable or line may be rea 'ly disconnected for threadin through the closure or whenever it is desire to remove the closure --from the line. The improved closure precludes the dangetof accident resulting from collision ct lllld the bailer with the casing closure, and as the closure is released automatically, the withdrawal of the bailermay proeeedwithout interruption or slowing-down such would be necessary if there were no means for automatically releasing the closure when the bailer approaches the top of the well.

The general form of releasable closure herein disclosed is claimed broadly in my above mentioned application, as is also the removable seat-forming collar 8. The advantage of the latter is that it adapts the 1111- proved closure to casing heads of standard construction, though it will be understood common to the latches and dependinglaeneath the closure.

3. The combination of a casing head, a casing head closure. formed with a cable passage, a, sleeve movable vertically in the passage and depending from the closure, and latch means operatively connected to the sleeve and adapted to detachably secure the closure to the casing head.

4:. The combination of a casing head, a closure therefor formed with a cable passage, normallyprojecting latches mounted in the closure and adapted to engage the head, dogs pivoted to the closure and operativelycorfneeted to the latches, and means for oscillating the dogs to retract the latches.

5. The combination of a casing head, a

closure therefor formed with a cable passage,"latch mechanism for securing the 'closure to the casing head, a sleeve movable vertically in the cable passage and depending therefrom and adapted when raised to release the latch mechanism, and a spring for opposing upward movement of the sleeve.

. 6 The combination o a asing head, a closure therefor formed with a cable passage, normally projecting latches mounted in the closure and adapted to. engage the head, dogs pivoted to the closure and operatively connected to the latches, and a device movable vertically in the cable passage and operatively connected to the dogs and depending from the closure.

7. The combination of a casing head, a closure theretor formed with a cable pas sage, normally projecting latches mounted in the closure and adapted to engage the head, clogs pivoted to the closure and uperatively connected to the latches, and a tubular device constituting a lining for the cable passage and movable vertically therein With the upper end of said device operatively connected to the dogs and with the lower end-of said device depending beneath the closure.

In testimony whereof I afiix my signature in presence of two witnesses.

CL RK BI B Witnesses:

J. M. Nnserr, F. E. GArrHnB. 

